FieldBench
York codes

York

5 red

Hazard

Rollout open

Flame containment. Manual reset.

Walk 5 red in Diagnose

5 plates — walk the one on the cabinet

First check

1 Treat this as flame outside the exchanger

Do not reset the York TM8T rollout and walk away. Write the code, kill the call, and look for flame at the burners, crossover, and vestibule before you do anything else.

Expect: No flame outside the exchanger. Burners seated. Crossover lit.

If pass: Still inspect secondary / flue / condensate before you reset.

The rest of the walkthrough is Diagnose.

On the plates

  • Primary exchanger cracks, burner alignment, crossover.
  • Blocked secondary / condensate / flue.
  • Reset only after the cause is fixed. Recurring 5-red is a CO / fire call.
  • Exchanger, burners, flue, secondary. Reset only after the cause.
  • Exchanger, burners, blocked metal flue. Reset only after the cause.

Plates that use 5 red